Allowance for Credit Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	$ 8,103		$ 16,268
Loans, Collectively evaluated for impairment	8,213,530		7,766,319
Loans, Acquired with deteriorated credit quality	72,424		83,463
Loans	8,294,057		7,866,050
Allowance for credit losses, Individually evaluated for impairment	2,472		4,091
Allowance for credit losses, Collectively evaluated for impairment	72,687		66,173
Allowance for Credit Losses	75,159	$ 73,965	70,264	$ 68,879	$ 68,836	$ 58,047
Non-owner occupied commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	0		0
Loans, Collectively evaluated for impairment	2,951,929		2,871,950
Loans, Acquired with deteriorated credit quality	28,882		34,064
Loans	2,980,811		2,906,014
Allowance for credit losses, Individually evaluated for impairment	570		753
Allowance for credit losses, Collectively evaluated for impairment	22,911		22,709
Allowance for Credit Losses	23,481	23,543	23,462	24,220	23,926	20,071
Owner occupied commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	6,474		12,041
Loans, Collectively evaluated for impairment	1,261,978		1,202,919
Loans, Acquired with deteriorated credit quality	31,525		31,229
Loans	1,299,977		1,246,189
Allowance for credit losses, Individually evaluated for impairment	907		983
Allowance for credit losses, Collectively evaluated for impairment	5,589		5,713
Allowance for Credit Losses	6,496	6,164	6,696	6,272	6,938	3,964
Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	1,106		0
Loans, Collectively evaluated for impairment	1,354,839		1,254,412
Loans, Acquired with deteriorated credit quality	5,683		6,402
Loans	1,361,628		1,260,814
Allowance for credit losses, Individually evaluated for impairment	5		5
Allowance for credit losses, Collectively evaluated for impairment	9,228		9,420
Allowance for Credit Losses	9,233	9,037	9,425	8,867	8,441	8,309
Non-owner occupied residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	523		441
Loans, Collectively evaluated for impairment	207,018		216,516
Loans, Acquired with deteriorated credit quality	1,019		1,069
Loans	208,560		218,026
Allowance for credit losses, Individually evaluated for impairment	14		16
Allowance for credit losses, Collectively evaluated for impairment	2,392		2,627
Allowance for Credit Losses	2,406	2,404	2,643	2,792	2,893	2,380
Commercial, industrial and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	0		2,806
Loans, Collectively evaluated for impairment	628,946		594,568
Loans, Acquired with deteriorated credit quality	3,973		9,337
Loans	632,919		606,711
Allowance for credit losses, Individually evaluated for impairment	827		2,150
Allowance for credit losses, Collectively evaluated for impairment	8,182		6,686
Allowance for Credit Losses	9,009	8,879	8,836	8,967	10,089	9,891
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	0		980
Loans, Collectively evaluated for impairment	333,998		379,120
Loans, Acquired with deteriorated credit quality	0		0
Loans	333,998		380,100
Allowance for credit losses, Individually evaluated for impairment	0		0
Allowance for credit losses, Collectively evaluated for impairment	2,584		2,968
Allowance for Credit Losses	2,584	2,732	2,968	2,889	2,937	838
Equipment finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	0		0
Loans, Collectively evaluated for impairment	174,946		151,574
Loans, Acquired with deteriorated credit quality	0		0
Loans	174,946		151,574
Allowance for credit losses, Individually evaluated for impairment	0		0
Allowance for credit losses, Collectively evaluated for impairment	6,866		3,445
Allowance for Credit Losses	6,866	6,484	3,445	2,534	2,253	3,663
Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	0		0
Loans, Collectively evaluated for impairment	955,332		764,340
Loans, Acquired with deteriorated credit quality	1,203		1,212
Loans	956,535		765,552
Allowance for credit losses, Individually evaluated for impairment	149		181
Allowance for credit losses, Collectively evaluated for impairment	9,760		7,860
Allowance for Credit Losses	9,909	9,605	8,041	7,440	6,579	3,914
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, individually evaluated for impairment	0		0
Loans, Collectively evaluated for impairment	344,544		330,920
Loans, Acquired with deteriorated credit quality	139		150
Loans	344,683		331,070
Allowance for credit losses, Individually evaluated for impairment	0		3
Allowance for credit losses, Collectively evaluated for impairment	5,175		4,745
Allowance for Credit Losses	$ 5,175	$ 5,117	$ 4,748	$ 4,898	$ 4,780	$ 5,017